Water-trap.



R. FOCK. WATER TRAP. APPLIOATION FILED JAN. 2']. 1908.

Patented May 18, 1909.

' To all whom it ,may concern:

shrew-r oFFioE} nonotrn FOUK, or HANOVER, GERMANY.

WATER-TRAR I No. senses.

Specification of Letters sttent. I Patented May 18, i809.

. Application filed January 2'7, 1908. Seriai-No. 412,874.

' through the latter is liable to produce suction by which the water-seals are removed from the traps, even if sir-pipes are provided. The present invention obviates this disedvantage.

A construction embodying the invention is shown in the annexed drawing, in which- Figure list a vertical, longitudinal of the improved trap, Fig. 2 an end-view, and Fig. 3 a plamview, half in section.

The verticalleg c oithe trap communicates with a basin or pan not shown in the drawing, and the part 9 communicates with the waste-pipe, which is also not shown. Between the legs a and i) an external Chitinher 0 is formed, with outwardly bulging sidewalls (Z, as shown in Figs. 12 and-3. ihc

chamber 0 communicates with the trap-pipe by ineansol orifices c andflocete'd at or near the lower. and upper knees respectively.

The axis of the orifice f is in the centratverti'cal plane of the trap-pipe; it is inunateriai in what position relative to this plane the orifice e is placed. The size of the orifices' and f depends on the size of the trap-pipe.

' Norinall the le s aand t and the chamber 4; contain water at a uniform level; as shown in Fig. 1..

waste-pipe causes suction to be produced at if a rush of water. down the g there is a diminution of; air-pressure above section i the water in the chamber a, and the waterlevel. in the said 'chamber rises, water being sucked into the chamberthroug h the orifice e. When the suction ceases water flows from trap-pipe, so that the seal remains intact.

other forms of trap having a communicating chamber by the relatively large capacity of the chamber above the norin'al water level up to the orifice f so thatthe water drawn into the trap by suction will not reach the orifice f or be drawn therefrom and lost. .The other orifice e is also placed so far below'the normal water level that when suction-occurs the as to permit air'to enter at the orifice e.

it will be seen that the construction of the very effective and reliable; i

What I claim as my invention and'desire to secure by Letters Patent'of the-United. States is I trap comprising lower and upper tubular water tra I closely be ore' the lower knee and above the upperlrn'ee respectively, the said chamber the hullrof water capable of being drawn therein by suction, and the lower orifice being. located below the lowest water level ternporarily produced in the trap by said suction, for the pur ose set forth.

specification in the presence of two witnesses.

- RUDOLPH FOCK. "Witnesses: i

1 ROBERT. v. Bnrow,

M. L. TnoMPsoN,

The construction is distinguished from water will not be drawn so far down theleg a trap is very simple, and the action thereof is The combination with a tubular water-- .knees, of an external chamber divided from, said water trap, located above the lower knee of the trap and communicating with the by --means of orifices located In witness wiereoi I. have signed this the chamber 0 through the orifice 'e to the having free ca iacity between the normal weterlevel and t o upper orifice greater than 

